-32.31% is the change from 390 to 264
Calculation steps:
[( 264 - 390 ) ÷ 390] x 100 = -32.31%
Formula
Percentage change = [(264 - 390) / 390] x 100
Subtract the new number by the original number
264 - 390 = -126
-126 ÷ 390 = -0.3230769230769231
-0.3230769230769231 x 100 = -32.31%